Shoe-calk



(No Modl.)

H. W. DE UOURTENAY.

SHOE GALK.

Patented Sept. 25, 1888.

UNITED STATES PATENT OFFICE.

HENRY \V. DE OOURTENAY, OF BOSTON, MASSACHUSETTS.

SHOE-CALKQ SPECIFICATION forming part of Letters Patent No. 285,582, dated September 25, 1883.

Application filed February 14, 1883.

shoecalks for the use of lumbermen, miners,

sportsmen, or othersrequiring the need of calks secured to the under side of boots and shoes.

The invention is carried out as follows, ref erence being had to the accompanying drawings, where Figure 1 represents a side elevation of my improved shoe-calk. Fig. 2 represents a side view of the wedge or spreader used in connection with the calk. Fig. 3 represents a View of the wedge and calk as put together previous to driving the shank into the boot or shoe sole. Fig. 4 represents a sectional view of a portion of a boot or shoe sole with the calk and wedge shown in the act of being driven; and Fig. 5 represents asectional view of a portion of a boot or shoe sole, showing the calk as driven home in the perforation in the sole and the split shank as expanded by the wedge.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

a is the conical or tapering and pointed downwardly-prey ecting head of the shoe-calk. a is the shank, adapted to be driven into the shoe-sole, which shank is provided with a central slit, a, extending from the upper end of the shank more or less toward the annular collar d of the conical or tapering head a, as may be desired. 12 is a tapering wedge or expander, which is inserted into the upper end of the split shank, as shown in Fig. 3, previous to (No model.)

driving it into the perforation in the under side of the boot or shoe sole.

In Fig. 4, 0 represents aportion of aboot or shoe sole, and c is a perforation into which the calk is to be secured.

The manner of driving and securing this my improved calk into the boot or shoe sole is as follows: The wedge or expander b is first inserted into the upper end of the slit to in the upper end of the shank a, as shown in Fig. 8. The shank and wedge are then inserted into the desired perforation in the sole, and driven into it by means of any of the usual tools for driving calks, during which operation the base of the wedge b is caused to stop against the bot tom of the perforation c in the shoe-sole, as shown in Fig. 4; and as the calk is further driven into the sole the wedge b is caused to enter the slit to of the split shank a still farther, and thus to cause the upper ends of the split shank to be expanded into the leather surrounding the perforation in the shoe-sole, as shown in Fig. 5, by which the calk is secured very firmly in place in the sole without any liability of being accidentally detached therefrom when the shoe is in use, or in case the leather gets dry, which is a common source of annoyance with the ordinary shoe-calks.

Having thus fully described the nature and construction of my invention, I wish to secure by Letters Patent and claim The herein-described boot or shoe calk, having conical or tapering and pointed head a, with the split shank c,having slit to, combined with the tapering wedge or expander I), as and for the purpose set forth.

In testimony whereof I have affixed my sig nature in presence of two witnesses.

HENRY IV. DE ()OURTENAY.

Vitnesses:

AL'BAN ANDRIJN, IIENRY CHADBOURN. 

